Pump jack



Feb. 14, 1928. 1,658,908

A. soMA x-:T AL l PUMP JACK Filed June 9, 1923 K .er f o firm/MEX Patented Feb.l 14:, 1928.

UNITED, STATES PATENT orifice.

ANDREW' s'oMA AND NRANK'BURMEISTER, or HARMONY, MINNESOT.

y PUMP Application led June` 9,

. by means of al gasoline or other motor.

It is an object ot this invention to provide such" a pump jack of simple construction which is very eliicient. 'f y It is arturther oh 'ect of the invention to providesucli a jack comprising a base having a driving shaft journaled therein which is connected with means for `reciprocating a pump plunger through a one-Way clutch.

Itis another object ot' the invention `to vprovide such a base and, driving shaft having a crank disk journaled thereon adapted to be connected through 4a. link and spring to a pump plunger, said shaft also carrying a one-way clutch lacting to connect said disk and shaft. l

These and other objects and advantages ot the invention ywill be fully set-forth" in `the :following description made in eonnec-` tion with the' Vaccompanying drawings in which like reference characters refer tothe same parts throughout the vdifferent views,

and in which, A 4

Fig. lis a view 'inside elevation showing i a pump and jack operatively connected thereto; v Z j Y Fig. 2' is a horizontal 'section taken on the line @-42 of Fig. 1, showing the jack proper in plan; 4 y c u F ig. 3 is a lview in side elevation of the device, as shown in Fig. 2; Y y

4f is a horizontal section taken on the line 4.-4 of Fig. 1, las indicated by the arrows;V

Fig. 5 is a view inside elevation of a portion of the device,` Figs.V 2te 5 being shown on an enlarged scale; n* 'Y Fig. 6 is avertical lsection taken on the line 6-G of Fig. 3, asindicated'by the arrows;

Fig. 7 is, a vertical section taken oii the line 7-7 of Fig. 6, as indicated bythe arrows, Figs. 6 and 7 being shown on a more enlarged scale. i

Referring to shown a .pump 1 of vstandard construction Vhaving at the top thereof the reciprocating plunger rod 2 uf'liich is provided with a plu-v rality of spaced apertures 3. TheL pump jack proper comprises a base ineiiibeifi e of the drawings. `in Lis JACK.

1923. S.e1ia1`N0.644,350.

general rectangular form in planhaving the legs 5l diverging from the corners thereof, which legs are apertui'ed adjacent their outer ends andare adapted to vbe bolted tothe` pump plattorin'or other suitable supporting surface. y'The base 1l is provided at each `end with a lbearing '6 having 'a removable cap thereon inl which bearings is journaled a "shatt`7y The shaft 7 projects at the ends'ot the base Il and at one end has j ournaled thereon a cran'kdisk Sliaving'a crank pin 9"pro"` jecting outwardly therefrom,y the; asid disk being held on said shaft by alcollar 10 pinned thereto. A link 11 has yits lower end 'Hattened and pivoted on the reduced end of the pin 9 and secured in 4place thereon by asplit hey or other suitabler means. While thelink 'il can be 'ci' adesired" form the same isillustrated asmade of tubular material, said tube heilig'7 as. stated, `flattened at its ylower end. AThe upper end of tlieitube is swaged toa small diameter andhas secured therein the downdiurned ends of rods 1Q,`\vhich rods extend lhorizontally and are providedwvith `one or more coils 13 therein." The other end of said rods 12 extends from the. coils 18 and are formed into eyelets adapted to rey l ceive aV headed and nutted bolt V14k passing therethrough and through one of theholes 3 in the plunger rod.

- 'I he shaft 7 has securedA `to its other tend, which projects beyond the end'ofpbase 4,'a

gear 15, which gear isdriven byfapinion lr6'A carried on ashait 17 journaled in abearing formed below one offthebearings 6` anda bearing in a bracket 18 projectingfro'm one end of the casing 4. The shaft 17 is provided with gambi@ `conm i9 ai. ythe @ausy of its bearings whichare pinned thereto and prevent longitudinal motion thereof. Said outer end a driving shaft carries at itsy pulley 20.' y

rThe crank kdisk 8 is formed on its inner side with, anannular groove adapted to `receive `a portion ofk a one-wayy clutch con.

nectingthe shaft 7 and saidv disk. Saidv clutchvcomprises a hub meniberQl pinned to the shaft 7 having al flange seated about lthe hub `of the'disk Sand inthe said groovey therein. `Half ring niembersfQQ are seated j in the' outer portion of said groove'and comprise almostsenii-circular members, the ends of which are spaced to form oppositely disposed grooves, the fla-nge of member 21 which is seated in the disk 8 also having oppositely disposed grooves `of similar width forlled` thm-ein. Dogg members 23 formed as segments ot a llat disk with a tooth forming notch 24 cut therein adjacent one end are disposed Lbetween the members and the flange of member 2l' andv are held in place between said members and in the `groove of the disk S by a plate fittingl over the hub of niemher 2l and held in place b v a pin 26 which secures member 2l to shaft 7. The dogs 23 haveI their ends seated, respectively, in the slot formed between the mcmbrs 22 and the slot in the flange of member 2l so that when the member 21 is rotated in the direction indicated hv the ari-onv in Figi 6, the said dogs will act to expand the half: rings 22 or force the .saine outwardlyY against the flange on the disk S. The said rings bind on the tlane'e ol the disk and the member 2l and yshaft M7 are thus connected in driving' relation to said disk.

The disk. how-ever. can rotate relativelyv to the member 2l and shaft 7 in the direction indicated by the arrou7 in Fie'. G. If the disk therefore turns faster than th-f` member 2l it Will over-run or run ahead of the member 2l and rotatek relativelj.rv thereto. The structure described thus forms a` one-Wav clutch for driving-r the disk S from theshaft 7, which clutch acts somewhat like the ivell knoivn ratchet.

n operation.y power is applied to thedevice from a suitable motor through a belt running' on the pulley 20. The shaft 7 is driven from said pulleyT through the shaft 17 and the lfears l15 and 16 and the disks 8 revolve throuah the described clutch mechanism. The link 1l and the pump rod 2' are thus elevated. After the" crank pinV 9. hon Yver. passes over the center, of the disk 8. the pump plunger 2 ma;7 descend bv `gravit;7 and will drop moving` the crank pin and disk S somewhat. llllhen the crank pin 9 passes thc central point at the bottom of the disk it again begins to lift the plunger ll and produces another stroke of the pump. It

the pump rod 2 does not-'descend readily bv `rravit;7 the described clutch will continue to drop the disk S and pull the pump plunger down. .lf desired. a spring' may be attached to the link ll so that it will always quickly pull the pump plm'le'er down and cause the disk 8 to rotate ahead of the member 2l aft-er the crank pin 9 passes its top central position. The iar of the descending plunger rod 2 is take-n up b v the spring 12 which also relieves any jerk or jar due lo the change in the direction of motion of the plunger rod rl`he reducingi` Agears 1G and l5 tend to ro tate the shaft 'T at suitable speed.

From the above description it is seen that applicants have produced a` simpl-e and ellicient pump j ack With means thereon for reciprocatingg` a pump plunger. The clutch described begins to lift the pump plunger inimediately after the same has descended so that no time is lost between reciprocations ot the pump plunger. The parts of the deviezl are fen' and easily made and assembled and the device is entremetsv rugged and durable.

It will. of course.r he understood. that va'- rious changes may he made in the form. details. arrangement and in'oportions ot' the parts Without departing` from the scope of applicants invention. which. generall)7 stated. consists in the matter shown and de scribed and set forth in the appended claims.

ll'hat is claimed is:

l. it pump jack compi-isine` a base, spaced hearings thereon. a shaft journaled in said bearings and projecting, at each end of said base. a crank disk carried .at one end of said shaft. a link connected at one end to said crank disk,y a spring` connected to the other.

end of said link and adapted to he connected to a pump plunger. a clutch device mounted on said Y shaft and adapted to drive said disk when said shaft turns in one direction. a bracket secured to said base. a shaft jour.- naled in said bracket. a pulley rcarried h v saidv second mentioned shatt, and reduction gears connecting said second mentioned sha litto said first mentioned shaft.

2. A pump jack comprising an elongated hase, spaced bearings thereon, aV shaft jonrnal-ed in said hearings, a` crank disk carried by said shaft at one end of. said base, a oneivay clutch between said shaft and disk whereby said disk Will be driven in ,only one direction, a vertically extending. link connected at its lonerend to said disk. a1 yieldine` arm rigidlyY connecter to said link z t its upper end and adapted to have its other end connected to a pump plunger. and a driving means ati the other end of said shaft.

nj testimon)Y whereot we allix our sienatures.

ANDREW SOMA. FRANK BURMEISTER. 

